MAX6957AAX-T Maxim Integrated Products, MAX6957AAX-T Datasheet
MAX6957AAX-T
Specifications of MAX6957AAX-T
Related parts for MAX6957AAX-T
MAX6957AAX-T Summary of contents
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... The MAX6957 is controlled through an SPI™-compatible 4-wire serial interface. The MAX6957AAX and MAX6957ATL have 28 ports and are available in 36-pin SSOP and 40-pin TQFN (6mm x 6mm) packages, respectively. The MAX6957AAI and MAX6957ANI have 20 ports and are available in 28-pin SSOP and 28-pin DIP packages, respectively ...
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LED Display Driver and I/O Expander ABSOLUTE MAXIMUM RATINGS Voltage (with Respect to GND) V+ .............................................................................-0.3V to +6V All Other pins................................................-0.3V to (V+ + 0.3V) P4–P31 Current ................................................................±30mA GND Current .....................................................................800mA Continuous Power ...
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LED Display Driver and I/O Expander ELECTRICAL CHARACTERISTICS (continued) (Typical Operating Circuit 2.5V to 5.5V, T PARAMETER SYMBOL Port Sink Current Output Short-Circuit Current I OLSC Port Drive LED Sink Current, ...
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LED Display Driver and I/O Expander __________________________________________Typical Operating Characteristics (R = 39kΩ +25°C, unless otherwise noted.) ISET A OPERATING SUPPLY CURRENT vs. TEMPERATURE 0. 2.5V TO 5.5V 0.36 NO ...
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... P31, individually as either LED drivers or GPIO. A pair of bits in registers 0x09 through 0x0F sets each port’s configuration The 36-pin MAX6957AAX has 28 ports P31. The 28-pin MAX6957ANI and MAX6957AAI make only 20 ports available. The eight unused ports should be con- figured as outputs on power-up by writing 0x55 to reg- isters 0x09 and 0x0A ...
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LED Display Driver and I/O Expander Table 1. Port Configuration Map REGISTER Port Configuration for P7, P6, P5, P4 Port Configuration for P11, P10, P9, P8 Port Configuration for P15, P14, P13, P12 ...
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LED Display Driver and I/O Expander P4 TO P31 LED DRIVERS LED DRIVERS AND GPIO OR GPIO SEGMENT OR GPIO DATA DIN SCLK Figure 1. ...
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LED Display Driver and I/O Expander 7-SEGMENT DIGIT 1 VIRTUAL SEGMENTS P10 P11 P12 P13 P14 P15 P16 P17 P18 P19 P20 P21 ...
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LED Display Driver and I/O Expander MICROCONTROLLER SERIAL DATA INPUT SERIAL CS OUTPUT SERIAL CLOCK OUTPUT SERIAL DATA OUTPUT Figure 4. Daisy-Chain Arrangement for Controlling Multiple MAX6957s CS SCLK D15 DIN D14 D13 ...
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LED Display Driver and I/O Expander It is acceptable to clock more than 16 bits into the MAX6957 between taking CS low and taking CS high again. In this case, only the last ...
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LED Display Driver and I/O Expander Table 3. Register Address Map REGISTER No-Op Global Current Configuration Transition Detect Mask Display Test Port Configuration P7, P6, P5, P4 Port Configuration P11, P10, P9, P8 ...
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LED Display Driver and I/O Expander Table 3. Register Address Map (continued) REGISTER Port 11 only (data bit D0. D7–D1 read as 0) Port 12 only (data bit D0. D7–D1 read as 0) ...
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LED Display Driver and I/O Expander Table 3. Register Address Map (continued) REGISTER 8 ports 16–23 (data bits D0–D7) 8 ports 17–24 (data bits D0–D7) 8 ports 18–25 (data bits D0–D7) 8 ports ...
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LED Display Driver and I/O Expander P31 GPIO INPUT CONDITIONING P30 GPIO/PORT OUTPUT LATCH GPIO INPUT CONDITIONING P29 GPIO/PORT OUTPUT LATCH GPIO INPUT CONDITIONING P28 GPIO/PORT OUTPUT LATCH GPIO INPUT CONDITIONING P27 GPIO/PORT ...
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LED Display Driver and I/O Expander Table 4. Power-Up Configuration REGISTER POWER-UP CONDITION FUNCTION Port Register LED Off; GPIO Output Low Bits Global 1/16 (minimum on) Current Shutdown Enabled Configuration ...
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LED Display Driver and I/O Expander Table 5. Configuration Register Format ADDRESS CODE FUNCTION (HEX) Configuration Register 0x04 X = Don’t care bit. Table 6. Shutdown Control (S Data Bit D0) Format ADDRESS ...
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LED Display Driver and I/O Expander Table 9. Global Segment Current Register Format (continued) LED DRIVE TYPICAL SEGMENT FRACTION CURRENT (mA) 6/16 9 7/16 10.5 8/16 12 9/16 13.5 10/16 15 11/16 16.5 ...
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LED Display Driver and I/O Expander Table 11. Even Individual Segment Current Format SEGMENT LED DRIVE CONSTANT FRACTION CURRENT WITH R = 39kΩ (mA) ISET 1/16 1.5 2/16 3 3/16 4.5 4/16 6 ...
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LED Display Driver and I/O Expander Low-Voltage Operation The MAX6957 operates down to 2V supply voltage (although the sourcing and sinking currents are not guaranteed), providing that the MAX6957 is powered Table 12. ...
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LED Display Driver and I/O Expander SPI Routing Considerations The MAX6957’s SPI interface is guaranteed to operate at 26Mbps on a 2.5V supply, and supply typically operates at 50Mbps. This ...
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... P20 18 P26 P21 19 P25 P22 20 P24 P23 GND 26 P7 GND 5 P8 ISET P10 11 DIN P11 U2 6 SCLK P12 8 CS P13 MAX6957AAX 10 DOUT P14 12 P15 13 P31 P16 14 P30 P17 15 P29 P18 16 P28 P19 17 P27 P20 18 P26 P21 19 P25 P22 20 P24 P23 a1 LED1 ...
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LED Display Driver and I/O Expander (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages ...
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LED Display Driver and I/O Expander (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages TOP VIEW ...
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LED Display Driver and I/O Expander (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 24 ______________________________________________________________________________________ Package Information ...
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... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 25 © 2007 Maxim Integrated Products Package Information (continued registered trademark of Maxim Integrated Products, Inc ...